例句與造句

1. This standard uses geolocation and spectrum sensing for spectral awareness.
2. Spectrum sensing observes the spectrum and identifies occupied channels.
3. In spectrum sensing cognitive radio, OFDMA is a possible approach to filling free radio frequency bands adaptively.
4. Also, it is more difficult to miniaturize components for such low frequencies ( in the electromagnetic spectrum sense ).
5. They may either retrieve a list of permissible channels from an associated fixed station, or may accept a lower output power of 50 mW EIRP and use only spectrum sensing . < r
6. It's difficult to find spectrum sensing in a sentence. 用spectrum sensing造句挺難的
7. Fixed devices also communicate with the central database to identify other transmitters in the area operating in TVWS . Other measures suggested by the FCC and IEEE to avoid interference include dynamic spectrum sensing and dynamic power control.
8. This issue is addressed by an alternative operation mode proposed in IEEE 802.22 called Dynamic frequency hopping ( DFH ) where data transmission of the WRAN systems are performed in parallel with spectrum sensing without any interruption.
9. This issue is addressed by an alternative operation mode proposed in IEEE 802.22 called Dynamic Frequency Hopping ( DFH ) where data transmission of the WRAN systems are performed in parallel with spectrum sensing without any interruption.
10. One of the key challenges of the cognitive radio based wireless networks, such as IEEE 802.22 wireless regional area networks ( WRAN ), is to address two apparently conflicting requirements : assuring Quality of Services ( QoS ) satisfaction for services provided by the cognitive radio networks, while providing reliable spectrum sensing for guaranteeing licensed user protection.
11. This information would be sent back to centralized servers ( in the USA these would be managed by the FCC ), which would respond with the information about available free TV channels and guard bands in the area of the BS . Other proposals would allow local spectrum sensing only, where the BS would decide by itself which channels are available for communication.